Dust-collector.



A. C. BRAN'HNGHAM & L. R. KEY.

DUST COLLECTOR.

APPLICATON FILED JAN-26. 1914.

1,239,456. Patented Sept. 11,1917.

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A. c. BRANTJNGHAM & L. R. KEY.

DUST COLLECTOR.

APPLICATION HLED JAN-26,19H.

1,239,456. PatentedSept. 11, 1917 2 SHEETS-SHEET 2- I TTORIIEI' UNITEDSTATES PATENT OFFICE.

ALLEN C. BRANTING-HAM, 0F TOLEDO, OHIO, AND LEWIS R. KEY, 015 GUELPH,ONTARIO. CANADA; SAID KEY ASSIGNOR TO HUNTLEY MANUFACTURING COMPANY, OFSILVER CREEK, NEW YORK, A CORPORATION OF NEW YORK.

DUST-COLLECTOR.

Specification of Letters Yatent.

Patented Sept. 11, 1917.

Application filed January 26, 1914. Serial No. 814,577.

To all whom it may concern Be it known that we, ALLEN C. BRANTING- HAM,a citizen of the United States, residing at Toledo, Lucas county, Ohio,and Lnwis R. Kev, a subject of the King of Great Britain, residing atGuelph, Ontario, Canada, have invented new and useful Dust- Collectors,of which the following is a specification.

This invention relates to mechanism for removing, and even classifying,particles in suspension from a medium as gas.

This invention has utility when embodied as asdust collectorparticularly in connection with cereal mills, elevators, etc.

Referring to the drawings:

Figure 1 is a side elevation with parts broken away of a pair of dustcollectors embodying the invention;

Fig. 2 is a section on the line ll ll Fig. 1, looking in the directionof the arrow;

Fii g. 3 is a side elevation with parts broken away of a dust collectorgrouping embodying the invention;

Fig. 4 is a section on the line IVIV Fig. 3, looking in the direction ofthe arrow;

Fig. 5 is a section on the line V-V Fig. 3, lookin in the direction ofthe arrow; and

Fig. 6 is a section on the line vi vr Fig. 5, looking in the directionof the arrow, on an enlarged scale.

The medium containing the particles in suspension, as dust laden air,may enter the ducts 1, 2, and be given respectively left and right handswirls in the vessels 3, 4. These cylindrical vessels are provided withthe tubular concentric ducts 5 having the discharge openings 6 from thecylindrical ves sels 3, 4, a greater distance from the intake ends Tthan the diameter of said cylindrical vessels. By reason of thisrelative length provision as to diameter, the swirl of the particleladen air in the cylindrical vessel is of such extent that the particlesin their abrupt travel as gaged by the velocity of supply through theintake openings quickly approach the periphery of the cylindricalvessels and when the air takes its reverse travel upward to go outthrough the tubes 5, there is caused a removal of particles therefromproportionate to the velocity of air travel and the character of thematter in suspension. For instance, in mills located in cities or wherethere is smoke contamination occurring in the mill these devices of theinvention used in connection with purifiers may make such classificationin separation that the particles thrown against the walls of thecylindrical vessels may be a high grade flour and the discharge throughthe ducts 5 a smoke laden air. in other words, the classilimition orctl'ectnal cleaning occurs with a material financial saving to themiller. By tapering the ducts 5 and introducing sleeves S. 9 in thecylim'lrical vessels, a shorter radius passage is provided, meaning thatmore abrupt changes in the directions of travel in the air swirls occur.This increases the effectiveness of centrifugal particle separation forentrance of the particles into the concentric pa rticlc receivingopenings 10, 11, respectively between the sleeve ,8 and the vessel i.and between the sleeve 9 and the sleeve 8. These separations cut oilparticles of material from disturl ance when the air current is reversedto go out the duct 5. However, the :wcumulation of particles in thetapered lower discharge vessels from the cylindrical vessels forms anair lock against air disturbance. This is produced by the packing memberor scroll 12 continuously driven by the sprocket wheel 13 and having theterminal packing shoe 1-1 blocking the discharge way 15.

Instead of classifying by making a single separation and leaving say thenormal impurities in the atmosphere to be taken out by the ducts 5 andso conducted to a stack the removed particles may be separated by stagesin a single vessel or vessels in )arallel, in some instances it may bedesirable to arrange the collectors in series or series multiple asshown in Figs. 3 and 4. The tangential intake opening 16 similar toopening 1 or 2 supplies the cylindrical vessel 17 from which theseparated aarticles may pass by the way 18 to the packing member 19 inthe housing 20 which serves as an air lock in forcing the particles outthrough the discharge way 21. The packing member is driven continuouslyby the sprocket wheel 13. The partially cleaned air passes upwardthrough the duct 22 into the ways 1, 2, supplying the cylindricalvessels 3, 4, having particle carrying discharge ducts 23, 24. The airthus cleaned or having the particles removed therefrom reverses itstravel, goes upward and out the ducts 25, 26, which may extend to a,stack outside the building and thus preclude the objectionable dischargeof deleterious material within the factory or mill. The purity of thedischarged air depends upon the capacity or rate of flow and of courseupon the character of the air to be cleaned and the particles in susension as well as the abruptness of the SWlIlS in the mechanism of thedisclosure.

In the devices of the invention it is possible to handle effectively aconsiderable volume of air and to attain Whatever end may be desired ascomplete removal of particles in suspension or a classified removal asin the instance of high grade flour from the purilier dust bycontrolling the flow rate of the air. The device proper has practicallyno running partsn1erely the packer which in the central discharge withthe three grouped scheme of Figs. 8, 4, 5, has the scrolls 26', 27oppositely pitched to work toward the kicker packing arms 19 for airlocking the discharge 21.

The device may be simply made of sheet metal and as there is noaccumulation in addition to that passing through the mechanism, thedevice acts uniformly at all times and precludes possibility of anydanger whatever from dust troubles such as spontaneous combustion.

What is claimed and is desired to secure by Letters Patent is:

1. A dry dust collector comprising a cylindrical vessel having adownwardly tapering narrowing lower portion, and provided with an uppertangentlal supply opening and an axial upwardly discharging opening, aplurality of vertically disposed nested cylindrical tubes coaxiallymounted in the vessel above the tapering portion, one of said tubesproviding a vertically open Way extending in the cylindrical portion ofthe vessel below the supply opening to adjacent the narrowing lowerportion, said tube being dis posed as to the cylindrical portion of thevessel to provide a uniform cross section ver tically open annular Wayfrom the supply opening to the axial discharge opening ef footingundisturbed dry annular centrifugal distribution of dust in the vesselagainst the vessel walls before reaching the region of the dischargeopening, said tapering portion conducting the dust away from distur anceby the discharge opening, and a dry scroll conveyor for removing thedust conducted down by the tapering portion.

2. A cyclone dust collector provided with concentric particle receivers,a vertically clear entrance chamber thereover, said receivers eachprovided with a single top intake opening and a bottom dischargeopening, the receivers between said openings being directed downwardlyand inwardly only, and a central vertically open duct for the cleanedair from which the receivers have removed the centrifugally thrownparticles, said vertically open duct extending below the intake openingto one of the particle receivers whereby the particle receivers precludedisturbance of the accumulated particles by the reverse air current ofthe discharge for cleaned air.

3. A. cyclone dust collector provided with concentric particle receivingpassages having intake openings disposed in longitudinal succession, anda central vertically open duct for the cleaned air from which thereceiving passages therealong have successively removed thecentrifugally thrown particles.

In testimony whereof We afiix our signatures in the presence of twoWitnesses.

ALLEN C. BRANTINGHAM. LEWIS R. KEY. -Witnesses:

GEO. E. KIRK, U. H. RAUoH.

' Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents.

Washington, D. C.

